ORDS 18.2 – The database user for the connection pool named apex_pu, is not authorized to proxy to the schema named

ORDS Version : 18.2 Oracle Version : 12cR2 Error : The database user for the connection pool named apex_pu, is not authorized to proxy to the schema named HR

Desc: The error occurs when you have published a RESTful web service from a table inside a schema. When you try to call the Webs service it gives an internal error, because the schema does not have proxy connect privilege to the ORDS public user.